CN205869083U - Laminar flow water back-spraying device - Google Patents

Abstract

The utility model relates to a laminar flow water reverse spray device, which comprises a laminar flow cooling water header and a reverse spray header, 6-8 rows of laminar flow cooling water headers are a unit, and the reverse spray headers are arranged between the units, A row of cylindrical nozzles are evenly distributed on the body of the spray header, and the water column ejected from the cylindrical nozzles forms an angle α=65°-75° with the running direction of the strip. The advantages are: the overall structure is simple and easy to operate. Since the anti-spray header is added between the units formed by the laminar flow cooling water header, the spray from each nozzle on the anti-spray header is at an angle α = 65 to the strip running direction The water curtain of °‑75° improves the sweeping ability of the side spray water, avoids the damage caused by uneven cooling of the steel plate and the equipment, and thus improves the surface quality of the strip steel. By limiting the θ angle, the residual water remaining on the surface of the strip can be effectively purged.

Description

A laminar water reverse spray device

technical field

The utility model relates to a laminar flow water reverse spray device, in particular to a laminar flow water reverse spray device for a continuous rolling production line.

Background technique

The hot-rolled strip is cooled by a laminar water curtain after leaving the finishing mill. The laminar flow cooling device is located between the finishing unit of the hot tandem rolling mill and the downcoiler, and is used to rapidly and forcibly cool the strip steel to ensure the coiling temperature. In order to improve the utilization rate of cooling water, side spray water is installed between each group of cooling headers. When the cooling water on the upper surface of the strip absorbs a certain amount of heat, the side spray water is used to wash the surface of the strip steel before forming a gas film. Realize the exchange of old and new cooling water. The original side spray water has insufficient sweeping ability, and it also directly sprays onto the roller table motor and roller bearing housing, which is easy to cause equipment damage.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a laminar flow water reverse spraying device, which has a simple structure, is easy to operate, improves the ability of side spraying water to sweep, and avoids the harm caused by uneven cooling of the steel plate and the equipment. Improve strip surface quality.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A laminar flow water reverse spraying device, comprising laminar flow cooling water headers and reverse spray headers, 6-8 rows of laminar flow cooling water headers are a unit, the reverse spray headers are arranged between the units, and the reverse spray headers are A row of columnar nozzles are evenly distributed on the body, and the water column sprayed by the columnar nozzles forms an angle α=65°-75° with the strip running direction.

The projection of the water spraying direction of the anti-spray header on the steel plate forms an angle θ=30°-40° with the running direction of the steel plate.

Compared with the prior art, the beneficial effects of the utility model are:

The overall structure is simple and easy to operate. Since the anti-spray header is added between the units formed by the laminar flow cooling water header, the spray from each nozzle on the anti-spray header is at an angle with the strip running direction α=65°-75 ° The water curtain improves the sweeping ability of the side spray water, avoids the damage caused by the uneven cooling of the steel plate and the equipment, and thus improves the surface quality of the strip steel. By limiting the θ angle, the residual water remaining on the surface of the strip can be effectively purged.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the blowing angle of the reverse injection header.

In the figure: 1-Reverse spray header 2-Laminar flow cooling water header 3-Cooling water nozzle 4-Roller table 5-Steel plate.

detailed description

The utility model is described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

See Figure 1 and Figure 2, a laminar flow water reverse spray device, including laminar flow cooling water header 2, reverse spray header 1, 6-8 rows of laminar flow cooling water header 2 as a unit, reverse spray header 1 It is arranged between the units, that is, the anti-spray water header 1 is in front of the first header of each unit. There is a row of cylindrical nozzles evenly distributed on the body of the anti-spray header 1, and the water column sprayed by the cylindrical nozzles runs with the strip steel. The directions are at an angle α=65°-75°.

As shown in Figure 2, adjust the angle of the cylindrical nozzles so that the purge water of adjacent cylindrical nozzles crosses and fully covers the width direction of the steel plate 5, and the projection of the water spray direction of the reverse spray header 1 on the steel plate 5 is consistent with The running direction forms an angle θ=30°-40°, which can better blow off the water on the surface of the steel plate 5 .

The utility model has a simple overall structure and is easy to operate. Since the anti-spray header 1 is added between the units formed by the laminar flow cooling water header 2, the spray from each nozzle on the anti-spray header 1 is at an angle to the running direction of the strip steel. The water curtain of α=65°-75° improves the sweeping ability of the side spray water, avoids the damage caused by uneven cooling of the steel plate 5 and the equipment, and thus improves the surface quality of the strip steel. By limiting the θ angle, the residual water remaining on the surface of the strip can be effectively purged.

Claims (2)

1. A laminar flow water reverse spray device is characterized in that it comprises a laminar flow cooling water header and a reverse spray header, and 6-8 rows of laminar flow cooling water headers are a unit, and the reverse spray header is arranged between the units A row of cylindrical nozzles are evenly distributed on the body of the anti-spray header, and the water column ejected from the cylindrical nozzles forms an angle α=65°-75° with the running direction of the strip. 2. A laminar flow water reverse spray device according to claim 1, characterized in that the projection of the water spray direction of the reverse spray header on the steel plate forms an angle θ=30°-40° with the running direction of the steel plate .